Sturdy Backpack buckle

The buckle of my backpack broke, so I created one that fits. I continued on the existing design by 3DMakerNoob . - Improved the sliding-mechanism. (Both for the buckle as the buckle-holder) - Stronger clips → less flex so less plastic deformation. - I also uploaded a version with an antislip attachment, so that the buckle stays better in place. I printed it on a Bambulab p1p printer in black ABS. Should also work fine with other materials and printers.